The Collagen Induction Cascade

Skin needling works by creating controlled micro-injuries in the skin using fine needles. These micro-channels trigger the skin's natural wound healing response, which unfolds in three overlapping phases: inflammation, proliferation, and remodelling.

In the inflammatory phase, platelets aggregate at the injury site and release growth factors including platelet-derived growth factor (PDGF), transforming growth factor beta (TGF-β), and vascular endothelial growth factor (VEGF). These signals recruit fibroblasts to the area.

In the proliferative phase, fibroblasts produce new collagen, primarily type III collagen initially, which is later remodelled into the stronger type I collagen. New blood vessels form, and the extracellular matrix is rebuilt.

The remodelling phase continues for months after treatment, which is why the full results of skin needling are not visible immediately. Collagen maturation and reorganisation continue for up to 12 months following a course of treatment.

Why Needle Depth and Device Quality Matter

Not all skin needling is equal. The depth of needle penetration determines which layers of the skin are targeted and what kind of response is triggered. Superficial needling (0.25 to 0.5mm) primarily enhances product absorption. Therapeutic needling for collagen induction typically requires depths of 1.0 to 2.5mm, depending on the area being treated and the concern being addressed.

Device quality also matters significantly. Medical-grade devices with precise depth control, sterile single-use cartridges, and consistent needle penetration produce more predictable and effective results than consumer-grade rollers or lower-quality devices.

At The Rejuvenation Space, we use medical-grade skin needling devices and tailor needle depth to each client's skin and treatment goals.

Combining Skin Needling with PRP

Platelet-rich plasma (PRP) is derived from the client's own blood. It contains a concentrated dose of growth factors, including the same PDGF, TGF-β, and VEGF that are released naturally during the wound healing response.

When PRP is applied to the skin during or immediately after skin needling, the micro-channels created by the needles allow the growth factors to penetrate deeply into the dermis, where they amplify and extend the collagen induction cascade. The result is a more significant and longer-lasting collagen response than needling alone.

The combination is particularly effective for skin laxity, fine lines, scarring, and overall skin quality. It is also well-tolerated, as PRP is autologous (derived from the client's own body), minimising the risk of adverse reactions.

Combining Skin Needling with Rejuran

Rejuran is a polynucleotide (PN) treatment derived from salmon DNA. Polynucleotides are biological molecules that support cellular repair, stimulate fibroblast activity, and promote the production of collagen and hyaluronic acid.

When Rejuran is used in combination with skin needling, the polynucleotides are delivered into the dermis where they provide sustained cellular support for the collagen induction process. The combination addresses both the structural (collagen) and functional (cellular repair and hydration) aspects of skin quality.

This combination is particularly effective for clients with thinning skin, loss of density, or skin that has been damaged by sun exposure or ageing.

What to Expect from a Course of Treatment

A single skin needling session will produce some improvement, but the most significant results come from a course of three to four treatments spaced four to six weeks apart. This spacing allows each treatment to build on the collagen response of the previous one.

After a course, maintenance treatments every three to six months help sustain results. The skin continues to improve between sessions as the collagen remodelling process continues.

Downtime is typically minimal, with redness and mild sensitivity for 24 to 48 hours following treatment. Most clients return to normal activities the following day.